US1134483A - Sewing-machine. - Google Patents

Description

G. B. OSTERHOUT.

SEWING MACHINE.

APPLICATION FILED SEPT-30, 1913. 4 1,1 4,43 7 Patented Apr. 6, 1915..

I LU nah t I r G. B. OSTERHOUT.

SEWING MACHINE.

APPLICATION min SEPT. 30. 1913;

Patented Apr. 6, 19m

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PATENT @Fi-FXCE.

GARRET B. OSTEBHOUT, OF PROVIDENCE, RHODE ISLAND, ASSIGNOR TO WILLCOX &

GIBBS SEWING MACHINE (30., OF NEW YORK, N. Y.,

A CORPORATION OF NEW YORK.

SEVTING-MAGHINE.

Specification of Letters Patent.

Patented Apr, 6, H915,

Application filed September 30, 1913. .Serial No. 792,676.

To all whom it may concern Be it known that If, GARRET B. Os'rnR- 110131, a citizen of the United States of America, and resident of Providence, Rhpde Island, have invented a new and useful improvement in Sewing-Machines, which m provement is fully set forth in the following specification.

This invention relates to sewing machines, and more particularly to parts designated as the loop-shedder and loop-spreader in machines of the character disclosed in the patents to S. Borton, No. 1,041,574, and A. A. Merritt, No. 1,05,652, both dated October 15th, 1912.

The objects and character of the invention may be most readily understood by reference to the accompanying drawings illustrating what is now regarded as the preferred embodiment thereof, and where- Figure l is a vertical sectional view through the end of the work-arm of the machine and stitch-forming parts associated therewith; Fig. 2 is a similar view with the parts in a different position of their movement; Fig. 3 is a detail view of the feed-member on which the loop-shedder blade or lip is formed; Fig. 4 is a similar detail in which a rod or wire forms the loopshedding edge; and Figs. 5 and 6 are detail views of the loop-spreader.

10 is a part of the end of a hollow workarm, upon the upper surface of which is mounted a work-plate or throat-plate 11.

12 is a main presser-foot,y13 an auxiliary resser-foot, and 1 1 needles (of which there are four, only one showing in the drawings) working through a slot in the main presserfoot 12.

15 is a looper lever, only the forward end of which is shown, on which is pivotally mounted a looper carrier 16, to which there is fixed four loopers 17 (only one of which shows in the drawings) adapted to cooperate with the four needles 1 1 respectively.

18 is a loop-check and needle-guide fixed to the side wall of the hollow work-arm 10 and positioned just above the end of looper lever 15 and the looper carrier 16 thereon.

The parts thus far described in detail are of substantially the same construction as the corresponding parts of the Merritt Patent No. 1,041,652, before mentioned, to which reference is made for a more detail explanation of their construction and operation. As in said Merritt patent, the drawings herein show a double feed, that is to say, two separate feed devices or surfaces which slightly differ in their relative movements, one acting on the work before it reaches the needles to give what is known as a fulling feed, and the other acting on the work after it has passed the needles to give the stitch feed. 7

As illustrated in Figs. 1 and 2, 20 is the fulling feed member and 21 the stitch feed member; each has a shank or foot by which it is secured'by a screw 22 (see dotted lines Fig. 1) to the forward end of a feed lever, there being one such lever for each feed member. The means whereby such feed levers and their associated feed members are given different relative movements which may be relatively adjusted and varied for different characters of work being done by the machine or for different thicknesses of goods and length of stitch, may be readily understood by reference to the aforesaid Merritt patent. A dotted line ellipse 23 in Figs. 1 and 2 illustrates the approximate path of movement of the stitch feed member 21.

In the aforesaid Merritt patent, there is shown a loop-shedder in the form of a projecting flange or lip secured to the under side of the throat-plate across the rear edge of the needle opening therethrough. In accordance with the present invention, the loopshedder is associated and movable with the stitch-feed member. 21, and in Figs. 1, 2 and 3 is shown in the form of a slightly inclined lip or blade 24 extending from the toothed portion of the feed member 21 rearwardly toward the needles and across the opening 25 in said feed member through which the needles operate. It has been found that the movement imparted to the stitch-feed member 21 is a desirable movement for a loopshedding blade, such as 24, and that by imparting such movement to the loop-shedder it acts more effectively and with greater certainty in pushing the loops of needle-thread off the loopers 17 at the proper time in the stitch-forming cycle than when the loopshedder is an immovable part secured to some fixed portion of the machine. In said Merritt patent there is shown a loop-spreader having at it forward end three horizontally projecting teeth adapted to engage the looper threads to properly spread the loops thereof tobe entered by the descending neev d-les. In accordance with the present invention, three teeth 26, 27 and 28' are formed to project downwardly from the under side of the end ofthe loop-spreader 29 and are inclined slightly toward the direction (indr cated by the arrow 30 in Fig. 5) in which the end of said loop-spreader 29 moves in en gaging the looper-threads and spreading the same for the needles to enter the loops thereof. With this formation'of the teeth, it is found that they engage, hold, and release the looper-threads with greater certainty of action at the high speeds at which machines of this type are operated. At its opposite end, the loop-spreader 29 has a circular open ing engaging around a circular flange 31 about an opening 32 through tailpiece 33. A screw 34 rigidly secures the spreader 29 to the tail-piece 33. A pivot-screw 35 passes through the opening 32 into a bracket 36 which is rigidly secured to and projects from the side wall of the hollow work-arm. A

depending roller 37 works in a cam-shaped groove of apart 38 fixed by a screw '39 to the looper-lever 15. The elliptical movement of the forward end of the looper-lever 15 carrying with it the part 38 with its. camshaped groove engaging the'roller 37, imparts to the loop-spreader 29 a pivotal movement about the screw-pivot 35 causing the toothed end of the loop-spreader to swing back and forth transversely to the work-arm, such movement being properly timed with relation to the movements of the loopers and needles.

In Fig. 1 with the parts moving in the directions indicated by arrows, the points of. the needles have penetrated the work, the loopers 17 are moving in a direction to disengage themselves from the loops of needlethreads, the loop-spreader with its teeth en-- gaging the looper threads is moving in a direction to spread the loops in said threads, the stitch-feed member 21 is moving toward the needles, and the edge of the loop-shedder blade 24 is in contact with the loops of needle-threads. In Fig. 2, these parts have moved further in the same directions, until the edge of blade 24 is about to disengage the needle-thread loops from the loopers and the needles have descended into loops of looper threads spread by the spreader 29.

, Instead of a blade or lip 24, the loop-shedder applied to the stitch-feed member may take the form of a rod or wire 40, Fig. 4, which will provide the necessary edge or part to engage the needle-thread loops and push them off the loopers. Furthermore, the

- movable loop-shedder of this invention may,

be embodied in forms other than those illus trated by way of example, and said'loopshedder need not necessarily be a part of a feed-member.

What I claim is 1.'The combination with one or more loopers and means for imparting thereto loop-taking and releasing or shedding movements; of a movable loop-shedder adapted to contact loops of thread on the looper or loopers and by its movement to push said loops toward the point of the looper or loopers while the latter are making their releasing or shedding movement; and means for actuating said loop-shedder.

2. The combination with one or more loopers and means for imparting thereto loop-taking and releasing or shedding movements; of a movable loop-shedder adapted to contact and push toward the point of the looper or loopers loops of thread on the latter, and means for actuating said loopshedder causing it to advance toward the point of the looper or loopers simultaneously with the receding or releasing movement of the latter.

3. The combination with one or more parallel to the line of feed and adapted to contact and by its movement push toward the point of the looper or loopers loops of thread on the latter; and means for actuating said loop-shedder.

5. The combination with one or. more loopers and means for imparting thereto.

loop-taking and releasing or shedding movements; of 'a feed-member having a part adapted in the movement of said member to contact and push toward the point of the looper'or loopers loops' of thread on the latter.

6. The combination with one or more loopers and means for imparting thereto loop-taking and releasing or shedding movements; of a feed-member having thereon a loop-shedding lip adapted in the movement of said member to contact and push toward the point of the looper or loopers loopsv of thread on the latter.

7. The combination with' a plurality of appropriately driven needles; of means-ineluding a plurality of loopers and a loopspreader having downwardly projecting thread-engaging teethadapted to project loops of stitch-forming looper threads through loops of thread projected by each of two needles from one side of the seam' 8. The combination of a plurality of appropriately driven needles; a throat-plate; one or a plurality of loopers and driving connections for operating the same in a plane approximately parallel to the throatplate; and a loop-spreader having downwardly projecting thread-engaging teeth and driving connections for moving the same in a plane approximately parallel to the throat-plate on an axis approximately perpendicular to said throat-plate.-

In testimony whereof I have signed this specification in the presence of two subscribing Witnesses.

GARRET B. OSTERHOUT.

Witnesses:

' W. T. LIDDALL,

L. P. DRUMMOND.

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